law enforcement authorities want more power to investigate. several groups, including chiefs of police, sheriff's associations, are pushing congress to pass a law saying your carrier has to record and store your text messages. it's not clear how long they want them stored. scott burns, of the national district attorney's association, one of the groups pushing the new law, says his group favors a period of three or four months. >> if you're in the middle of an investigation and bad guys are communicating back and forth, whether it's a homicide, whether it's evidence of a crime, its's crucial. i mean, 20 years ago, we weren't talking about this. today, everybody has a cell foenl. everybody texts and e-mails and is on social med. that's where the evidence is today. >> reporter: or not. major carriers like at&t, sprint or mobile didn't retain any content of customer's text messages. verizon keeps them for up to five days. >> scott burns says it's faster and more efficient to get from the carriers. hoe points out that, of course, the bad guys often